Fibroelastoma

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Photomicrograph of a fibroelastoma showing the fine frond-like projections.
Photomicrograph of a fibroelastoma showing the collagenous core surrounded by a loose myxoid stroma and lined by endothelium.

Papillary fibroelastomas are benign lesions with a fine frond-like appearance found on heart valves. Not to be confused with elastofibromas which tend to be found in the skin/soft tissue.